GHD | Oceana Gold New Zealand Ltd. | 12552081 | Waihi North Project D-13 Table 12 WKP03 Water Quality Analytes Units Count Minimum Maximum Mean Median Alkalinity - Total g/m3as CaCO3 18.5 20.0 19.5 20.0 20 Aluminium-Dissolved g/m3 0.013 0.013 0.013 0.013 0.013 Antimony-Dissolved g/m3 0.0002 0.0002 0.0002 0.0002 0.0002 Arsenic-Dissolved g/m3 0.0010 0.0012 0.0011 0.0011 0.0011 Bicarbonate g/m3at 25°C 23 25 24 24 24 Boron-Dissolved g/m3 0.009 0.009 0.009 0.009 0.009 Cadmium-Dissolved g/m3 0.00005 0.00005 0.00005 0.00005 0.00005 Calcium-Dissolved g/m3 3.70 3.90 3.80 3.80 3.8 Chloride g/m3 8.00 9.00 8.67 9.00 9 Chromium-Dissolved g/m3 0.0005 0.0005 0.0005 0.0005 0.0005 Cobalt-Dissolved g/m3 0.0002 0.0002 0.0002 0.0002 0.0002 Copper-Dissolved g/m3 0.0005 0.0005 0.0005 0.0005 0.0005 Electrical Conductivity mS/m 7.20 7.60 7.37 7.30 7.3 Hardness-Total g/m3as CaCO3 15.7 17.4 16.5 16.4 16.4 Iron-Dissolved g/m3 0.02 0.03 0.02 0.02 0.02 Lead-Dissolved g/m3 0.0001 0.0001 0.0001 0.0001 0.0001 Magnesium-Dissolved g/m3 1.50 1.84 1.69 1.72 1.72 Manganese-Dissolved g/m3 0.0044 0.0067 0.0055 0.0054 0.0054 Mercury-Dissolved g/m3 0.00008 0.00008 0.00008 0.00008 0.00008 Molybdenum-Dissolved g/m3 0.0002 0.0002 0.0002 0.0002 0.0002 Nickel-Dissolved g/m3 0.0005 0.0005 0.0005 0.0005 0.0005 Nitrate-N g/m3 0.004 0.014 0.009 0.008 0.008 Nitrate-N + Nitrite-N g/m3 0.004 0.015 0.009 0.009 0.009 Nitrite-N g/m3 0.002 0.002 0.002 0.002 0.002 pH pH units 7.1 7.2 7.2 7.2 7.2 Potassium-Dissolved g/m3 1.22 1.31 1.27 1.28 1.28 Sodium-Dissolved g/m3 7.80 8.10 8.00 8.10 8.1 Sulphate g/m3 5.0 6.0 5.3 5.0 5 Zinc-Dissolved g/m3 0.004 0.004 0.004 0.004 0.0042
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